Bending-machine.



C. N. REPLOGLE.

BENDING MACHINE.

AYPLIGATION FILED JUNE19,`1012.

1,068,078. Patented July 22, 1913.

2 SHEETS-SIIEBT l.

G. N. REPLOGLE.

BENDING MACHINE.

APPLICATION FILED JUNE 19, 1912.

1,068,078. y Patented July 22, 1913.

2 'SHEETS- SHEET 2A 0 f/r L?? I i? ff ff :OLUMHIA PLANOGRAPH 60,. wnslllNuToN. n. c

CHARLES N. REPLOGLE, OF WESTIVIONT, PENNSYLVANIA.

BENDNG-MACHINE- Specification of Letters Patent.

Application led .Tune 19, 1912.

Patented July 22, 1913.

Serial No. 704,478.

To all LU/Lem t may concern:

lie it .known that l, @Hannes N. RnrLooLn, a citizen oi the United States, residing in the borough ot Viiestmcnt, in the county oi? Cambria and State of Pennsylvania, have invented certain new and use t'ul In'iprovements in Bending-Machines5 and I do hereby declare the following to be a Stull, clear, and exact description of the invention7 such as will enable others skilled in the art to which it appertains to malte and use the same.

My invention relates to improvements in machinery for bending bars, pipes, rods or tubes and more particularly to an improved machine whereby is facilitated the forming ot such bands as are intended for hoops to gird and bind the staves used in constructing wooden pipe-lines, tanks, etc.

lfn order to simplify the description and illustrations l will show and describe a band of round section with head on one end and rolled thread and nut on the other end, bent to required form in my machine, but I wish it understood that l may adaptmy machine to .make other forms as may be desired and either full circles or part circles.

'il he band shown and described herein, comlnises a round rod oit metal ot proper length bent into a substantially circular' term, with a head tormed on one end7 while the opposite end upset by rolling the thread thereon to receive the nut. lfVhen placed in position upon the pipes the encircling band acts in conjunction with a nut and al metal c(ninecting` clamp or shoe by means ot which the band extremities are securely held and so controlled as to enable the band to be drawn to its required tight lit upon the pipe by screwing up the nut.

To atlord the greatest convenience in at- .lixing a band upon the 'circumference et a pipe7 with a minimum amount of time and` labor it is very necessary that the band has been previously bent to the most suitable it'orm, so that it may be easily placed about the pi pe at the point desired, with its headed and threaded ends conveniently applicable to their intended positions within the connecting clamp or shoe. Such a suitable t'orm ot band has tor the greateipart oit its length a bend, the radius ot curvature of which the same or slightly greater than that olf the outer :ircumterence ot the pipe for which the band is intended. The end oi' the band having the thread for the nut is not so curved, however, but for a. suitable distance, including the threaded end, is straight and tangent to the arc or curvature oit' the bent part ot the length et the band, thereby remlering the threaded end conveniently accessible to its intended position in the connecting clamp and permitting therein the required tightening oit the band upon the pipe by means of the nut. The other end of the band on which is formed a head is also straight tor a shorter distance, where it is inserted in the notch of the clamp in order to better iit and perform its desired functions.

One oit' the objects oft my invention is to provide an improved machine .tor forming the straight rods into pipe bands of the desired shape and size at one operation, with a minimum requirement oiE time and labor.

.another object is the manner el adjusting the pressure roll whereby I am enabled to produce bands ot diti'erent sizes and radii or curvature.

A still further object ot my invention is to construct a machine which can be easily transported trom place to place within the shop or elsewhere by means ot a crane or other power.

My invention also comprises a particular construction and arrangement oil' the grooves in the rolls, to allow the head ot the band to pass without deformation.

lVith these objects in view, my invention comprises certain novel. constructions, combinations and arrangements ot' parts, as will be hereinalter more 'fully described and pointed out in thc appended claims.

Referring now to the ac'con'ipanying two sheets ot drawings forming part of this specititntion` in which Figure l is a top plan view oill my band bending machine. showing a rod being bent to torni a pipe band. the threaded end hat ing been tirst lcd to the machine beyond the rolls; the dotted lines indicating the approximate path o't the band, as the operation progresses. AFig. is a `front. ele vvation illus trating my machine with an electric motor itor rotating the Feed rollers. Fig. 3 is a vertical longitudinal section taken on the line lll lll ot lfig. l showing parts in elevation. lllig. f-lis an end elevation ot my machine showing especially the toot controlling mechanism oit the valve through means ot' which. the bending mechanism ot' the machine is controlled. Fig. is a detail view of the controlling valve in elevation, with operating mechanism attached thereto. Fig. 6 is a vertical transverse section of th-e controlling valve taken on a line with the exhaust. Fig. 7 is a vertical longitudinal section taken through the central portion of a pipe band connecting clamp, showing the ends of the pipe bands attached thereto in elevation, and in the position they will assume when fastened upon a pipe. Fig. 8 is a detail view on an enlarged scale illustrating the grooving of the rolls used to bend and feed`the pipe band rods through the machine, one of the grooves being made larger and of greater depth than the other, in order to enable the headed end of the rod to pass without injury. Fig. 9 is a diagrammatic view in plan showing the grooved pressure roll retracted so that the upset threaded end of the rod may be placed between the roll in the position indicated.

In the drawings in which like characters of reference designate corresponding parts throughout the several views the structural frame work of the machine is shown as of rectangular form comprising vertical plate standards 1 at each corner connected together in pairs on each longitudinal side at their lower ends by the angles 2 the horizontal flanges of which are flush with the floor or foundation, and act as feet for the machine, and inner angles 3, the horizontal flanges of which extend inwardly for attaching a base plate 4 thereto, while their vertical legs extend downwardly and are riveted to the vertical upwardly extending legs of the angles 2 through the standards 1. The upper ends of the standards 1 are also connected together longitudinally at the sides in pairs by angles 5 on their inner and outer faces. These angles 5 are placed back to back and riveted together through the standards 1 with their horizontal flanges extending outwardly 'therefrom on either side flush with the top ends of the standards 1. A plate (3 connects together the inner horizontal i'ianges of the angles 5 and forms the operating platform for the machine.

The power shaft is indicated at 7, which I prefer to drive direct by a motor 8 mounted on the base plate 4, as shown, or by any other suitable means. The power shaft has a suitable bearing block 9 and a bevel pinion 10 attached to its outer end which meshes with a bevel gear 11 keyed to a vertical shaft 12, to the lower end of which, beneath the )ase plate is secured a gear 13 which meshes with an idler gear 14 adapted to rotate on a stub shaft 15 attached to the base plate 4. This idler gear also meshes with a gear 16 keyed to the bottom end of a vertical shaft 17 extending parallel with the shaft 12. These three gears 13, 14 and 1G `are all of the same sizewhich, through the interposition of the idler gear 14 enables the shafts 12 and'l? to rotate at the same speed and also in the same direction.

The shafts 12 and 17 have suitable bearings attached to and formed in the table and base plates 6 and 4 and to the upper ends of the shafts are keyed or otherwise secured the rolls 18 and 19, which act as the feed rolls, each of whici has around its periphery an annular groove as shown at 20 and 21. rthe groove 21 on the roll 19 mounted on' the upper end of shaft 17 is wider and deeper, as clearly illustrated in F ig. 8 of the drawings, in order to allow the headed end of the band to pass without injury at the completion of the bending operation.

Attached to the under side of the table plates 6 at an intermediate point is a cylinder 22 having a piston 23 and rod 24 which extends outwardly through the cylinder head ending in a clevis for pivotally connecting, by means of a lateral pin 26, the downwardly extending ear 27 of a slide 28, which slide is mounted and adapted to reciprocate in a slide-way 29, formed in a slideway bearing block 30 attached to the und-er side of the table plate (i in front of cylinder 22.

A socket is formed in the upper face of the slide 28 in which is seated and rigidly secured thereto a stub shaft 31 extending upwardly therefrom through a longitudinal slot formed in the table plate G and the bearing block 30 as shown at 32. This slot is made centrally between the rolls 18 and 19 but at one side thereof and at right angles to a line between the two. An idler pressure roll 33 having an annular groove 34 around its periphery similar to roll 18 is mounted on the upper end of this stub shaft and in the same plane as the rolls 18 and 19 but in staggered relation thereto.

The idler presser roll 33 is adapted to be projected forward through its connections p by Huid pressure which enters the cylinder. at the rear of the piston 23 through a pipe 35 and retracted by means of a helical spring 3G which surrounds the piston rod 24 between the front end of the cylinder and the piston and returns the piston 23 to its normal position at the rear end of the cylinder after the exhaust of the fluid pressure.

In order to produce different sized bands the forward movement of the slide is controlled by means of a stop 3T, comprising a threaded rod which is screwed into the end of the slideway bearing lock 30 and operated by a handwheel 38.

39 indicates the controlling valve casing having an inlet port 40 for attaching a pipe connection 41 through which is received the fluid pressure from any suitable source of supply, and an exhaust port 42. A rotary three-way plug valve 43 which has inlet and exhaust ports elet and el?) made to register as desired with the ports a() and 42 by means oit a stop 4:6, has a central outlet port Llg? tor connnunicating with the pipe 35 tor admitting and exhausting the Huid `pressure to and from the cylinder 22. A rocker arm 4:8 is attached to the valve stem Li9 with its ends extending outwardly on either side thereof. Eyes are formed in these ends for the receptionof the upper ends oit' the links The lower end el the one of said links has secured thereto a counter weight- 51, while the opposite link has its lower end attached to a treadle 52.

Having given a gene al description et the machine, ll will now, inV order to make it more clear, describe the rod bending operation of the machine and the mode oi attach* .ing the band by means ot' a clamp te the pipe A rod 53 ot' the required size and length, having preferably i an upset roll threaded end portion, as at 541.-, with a nut screwed thereon, and a headed opposite end, as at 5G, is placed upon the table plate G between the grooved driving feed rolls 18 and 19, and the idler pressure roll. 53, its threaded end extending beyond the rolls in substantially the position shown diagrammatically in F ig. 9. rllhe operator then places his toot upon the treadle 52 and presses it downward which opens the valve and allows the compressed air or other tluid pressure to liow into the cylinder 22, 'orcing iorward the piston 23 and rod 24 with the clevis 25 on its outer end, which is connected by means of the lateral pin Q6 to the ear 27 of the slide 2S carrying the stubshait 3l upon which the idler pressure roll is mounted. These parts then assume the positions shown in Figs. 1, 2 and 8, the adjustable stop limiting the forward movement ot the slide. In this position the rod enters the annular grooves in the peri pherics of the pressure roll B3 and the feed driving rolls 18 and 19. These rolls 18 and 19 are continuously driven in the same direction by the motor, through its connections and train of gearing which rapidly drives the rod forward, bending it at the same time, into a circular Atorni between the combined action et the pressure roll 83 and the :toed rolls 18 and 19. The iornf'ard end of the band as it nears completion runs up the inclined face oit a block 57 in order that the end oit the band will not come in contact with the rolls. if he head o'li the band at. the end ot operation passes beyond the roll 19 at which point the pressure roll will not contact with the end ot the band. rlfhe operator then releases the treadle 52 which returned to its first position by the counter weight 51 the tluid pressure .trom the pressure cylinder 22 being exhausted through the exhaust ports Il2 and 4to, the piston 23 being returned to the rear end of the cylinder by the helical spring 3G carrying with it the mechanism attached thereto. The 'formed band is then taken away and the operation above described repeated on another rod. A. band thus formed has the straight end portions as desired and the forming is completed Vin one very speedy and around the pipe section, its opposite, threaded end portion is received within the groove 59 extending' through the opening 6l. and notch G() and projects beyond the outer wall GQ of the notch l() which is slightly inclined from the vertical. rlilhe AFace oi the groove 59 is slightly inclined trom the horizontal, being at right angles to the side wall (32 of the notch (30, so that when the nut is screwed in place upon the thrcaifled end oi' the band the base ot' the nut will be [lush with the side wall G2 and have a perfect bearing sui."tace.

Although l have shown and described my improvements in considerable detail, l do not wish to be limited to the exact and specific details shown and described, but may use such suljistitutions, modiiiiaitions or equivalents thereof, as are embraced within the scope oft my invention, or as pointed ont in the claims.

Having thus described my invention, what l claim and desire to secure by Letters Patent is 1. ln a bending machine, a receiving table, a pair of grooved feed-rolls rotatably mounted thereon, the axes ot which are arranged. at a ].i1-edeter1nined distance apart, the groove in the first acting one ot said pair ot' rolls heilig larger than the grooves in the other rolls, means 'tor continuously rotating said .'leed-rolls, a grooved idler pressureroll reci procably and rotatably mounted on said table opposite to and in staggered relation with the pair ot iieed-ii'olls aforesaid, and means below the receiving table for moving said idler p1.'essure-rol l transversely to and trom the opposing surfaces oit the 'temi-rol ls aforesaid.

f2. lin a band bending machine, a receiving table, a pair ot continuously rotating toed rolls mounted apart thereon, adapted to cngage one side ort the rod to be bent, an idler pressure roll mounted above the table opposite the opening between the pair ot it'eed rolls, but in staggered relation thereto, a stub shaftv extending from the grooved idler pressure roll through a slot in the table and rigidly attached to a slide mounted below the table, an ear projecting from the slide to which is connected a clevis attached to the forward end of a reciprocable rod adapted to advance the grooved idler pressure roll and thereby engage the opposite side of the band between the continuously rotating feed rolls, whereby the band is simultaneously bent and advanced, and a stop for gaging the forward movement of the slide, thereby controlling the circular diameter of the bands.

3. In a band bending, machine, a receiving table, a pair of continuously rotating` grooved feed rolls adapted to engage one side of the band, one of said grooves beingl wider and deeper to allow the head of said band to pass without injury, a grooved idler pressure roll movably mounted on a stubshaft adapted to engage the opposite side of the band between its contacts with the pair of continuously rotating grooved rolls, said stub-shaft extending downwardly from the grooved idler pressure roll through a slot in the table and rigidly secured to a slide mounted beneath the table, reciprocating means mounted below said table and connected to said slide7 a stop adapted to limit the forward movement of the slide, whereby the grooved pressure roll is advanced to the extent desired for bending the band continuously, an incline mounted on the table adapted to raise the forward end of the band as it nears completion and allow it to pass over the tops of the rolls.

In testimony whereof I hereto affix my signature in the presence of t-wo witnesses.

CHARLES N. REPLOGLE. NVitnesses:

Y. F. GROGAN, ELMER SEAVEY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

